<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>对元素值操作的示例</title>
<style>
body{
	font-size:12px;
}
</style>
<script type="text/javascript" src="../js/jquery-3.3.1.min.js"></script>
<script type="text/javascript">
   $(document).ready(function(){
		$("select").val(['列表项1','列表项2']);
		alert($("select").val());
   });
</script>
</head>
<body>
<select name="like" size="3" multiple="multiple" id="like">
  <option>列表项1</option>
  <option selected="selected">列表项2</option>
  <option selected="selected">列表项3</option>

</select>
</body>
</html>
